CN1578554A - Organic electroluminescence device - Google Patents
Organic electroluminescence device Download PDFInfo
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- CN1578554A CN1578554A CNA2004100684411A CN200410068441A CN1578554A CN 1578554 A CN1578554 A CN 1578554A CN A2004100684411 A CNA2004100684411 A CN A2004100684411A CN 200410068441 A CN200410068441 A CN 200410068441A CN 1578554 A CN1578554 A CN 1578554A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/87—Arrangements for heating or cooling
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/26—Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/22—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
- H10K50/828—Transparent cathodes, e.g. comprising thin metal layers
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- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
A thin organic EL device (11) having improved heat radiation characteristics. A transparent electrode (13), an organic EL layer (14), and a metal second electrode (15) are sequentially superimposed on a glass substrate (12). A plurality of projections (19) extend from the upper surface of the second electrode. A protective film (16) protecting the organic EL layer from oxygen and moisture is in close contact with the second electrode. A conductive film (17), which is insulated from the second electrode, includes a first end portion and a second end portion connected to the first electrode.
Description
Background of invention
The present invention relates to a kind of organic electroluminescent (EL) device.
Organic EL device is for being subjected to extensive concern as display device or thin luminescent device.Typical organic EL device comprises transparency electrode (anode), organic EL layer and negative electrode, wherein transparency electrode is made of tin indium oxide (ITO) and is formed on the glass substrate, organic EL layer has the luminescent layer on the transparency electrode of being formed on, and negative electrode is formed on the organic EL layer.Luminescent layer produces the light that sends from glass substrate.
Organic EL layer is vulnerable to the infringement of moisture and oxygen usually.Therefore, protective cover is bonded to the infringement of avoiding moisture and oxygen on the substrate with the protection organic EL layer with binding agent.Organic EL layer and negative electrode are contained in the seal cavity that limits between protective cover and the substrate.Seal cavity is full of as the inert gas of nitrogen and argon or inert fluid.
Between anode and negative electrode, apply driving voltage, make electric current flow through organic EL layer between anode and negative electrode so that luminous from electroluminescence layer.The current flow heats organic EL layer.The shortcoming of protective cover is the thermal radiation of its influence from organic EL device.
The example of first prior art of head it off has been described in Japan special permission publication publication number No.2003-22891.With reference to figure 5, the disclosure has been described organic EL display device 41, and it comprises glass substrate 43.A plurality of electrodes 42 are formed on the glass substrate 43.Organic EL layer 44 is stacked on the glass substrate 43.Organic EL display device 41 further comprises the top electrode 45 towards glass substrate 43.Sealing plate 48 is glued to substrate 43 by sealing 47.Seal cavity 46 is limited between sealing plate 48 and the substrate 43.In seal cavity 46 a plurality of polygonal protruding 49 from power on the utmost point 45 to sealing plate 48 projectioies.
The example of second prior art has been described in U.S. Patent No. 5821692.With reference to figure 6, the disclosure has been described organic EL device 50, and it has the protective cover 54 that comprises fin 56.Transparency electrode 52 is formed on the transparent substrates 51.Protective cover 54 is connected on the transparency electrode 52 to cover organic EL array 53.Liquid 55 is charged in the protective cover 54.
In the organic EL display device 41 of Fig. 5, the gas from the hot heated sealant space 46 of protruding 49 radiation.Yet heated gas can not discharge from seal cavity 46.Therefore, thermal radiation effect is insufficient.And, must use seal cavity 46 to make and be difficult to produce thinner organic EL display device 41.
In the organic EL device 50 of Fig. 6, the heat of organic EL array 53 is transmitted to protective cover 54 by liquid 55.Yet filling liquid is a trouble in protective cover 54.And, must use protective cover 54 to make and be difficult to produce thinner organic EL device 50.
The light intensity (luminosity) that sends from organic EL device is directly proportional with current amount flowing between anode and negative electrode.And the resistance of the material of formation transparency electrode is greater than the resistance of the material that forms metal electrode.Therefore, different with current value near the electrode terminal position with resistance value away from the electrode terminal position.Official post between the current value must be in organic EL device the brightness difference of diverse location.
For the luminosity difference is minimized, the metal auxiliary electrode that is connected to anode terminal can be arranged on the peripheral part of transparency electrode.
Summary of the invention
The present inventor has realized that when from the thermal radiation of organic EL layer when insufficient, often causes brightness irregularities at the resistance of the material that forms transparency electrode and the difference that forms between the resistance of material of auxiliary electrode.Therefore, an object of the present invention is to provide a kind of thin organic EL device with uniform luminance.
In order to achieve the above object, the invention provides a kind of organic electroluminescence device that comprises the substrate that is used for visible light transmissive.First electrode is stacked on the substrate with visible light transmissive.Organic electro luminescent layer is stacked on first electrode.Second electrode is stacked on the organic electro luminescent layer.Second electrode comprise first surface towards organic electro luminescent layer, dorsad the second surface of organic electro luminescent layer and a plurality of projectioies that are provided with along this second surface or a plurality of grooves at least the two one of.Cover the diaphragm protection organic electro luminescent layer of second electrode.
Other aspects and advantages of the present invention will be in conjunction with the accompanying drawings, illustrate that by example principle of the present invention also becomes apparent from the following description.
Description of drawings
By description and accompanying drawing with reference to the preferred embodiment that is proposed, the present invention may be better understood and purpose and advantage, wherein:
Figure 1A is the plane graph according to the organic EL device of first embodiment of the invention;
Figure 1B is the schematic cross section along the organic EL device of the 1B-1B line cutting of Figure 1A;
Fig. 1 C is the schematic cross section along the organic EL device of the 1C-1C line cutting of Figure 1B;
Fig. 2 A is the schematic diagram of the layout of expression first electrode and splicing ear;
Fig. 2 B is the perspective view of expression second electrode and projection;
Fig. 3 is the cross-sectional view according to the organic EL device of second embodiment of the invention;
Fig. 4 is the cross-sectional view of the organic EL device of further embodiment according to the present invention;
Fig. 5 is the cross-sectional view of first prior art example of expression organic EL device; And
Fig. 6 is the cross-sectional view of second prior art example of expression organic EL device.
Embodiment
Organic electroluminescent (EL) device 11 according to first embodiment of the invention will be discussed now.Different with actual size at Figure 1A to the relative dimensions that 2B illustrates part.
To 1C, organic EL device 11 comprises first electrode 13, organic EL layer 14 and second electrode 15 with reference to Figure 1A, and they are stacked on the glass substrate 12.Second electrode 15 and organic EL layer 14 protected films 16 cover.Diaphragm 16 protection organic EL layers 14 are avoided the infringement of oxygen and moisture.The glass substrate 12 and first electrode 13 are transparent and allow visible transmission.Organic EL layer 14 produces the light that sends from glass substrate 12.Therefore, organic EL device 11 is so-called bottom-emission type devices.
Conducting film 17 is formed on the diaphragm 16.Conducting film 17 and 15 insulation of second electrode.And conducting film 17 is formed by the material of resistivity less than the resistivity of the material that forms first electrode 13.In first embodiment, conducting film 17 is aluminum vapor deposition films.When seeing glass substrate 12 from above, conducting film 17 has and first electrode, 13 essentially identical shapes.Conducting film 17 has first end 17a and the second end 17b, and wherein first end 17a is connected to first end of the first splicing ear 13a of first electrode 13, the second end 17b be connected to the first end opposite side on the second end 13b of first electrode 13.Cover conducting films 17 by the dielectric film made from diaphragm 16 same materials 18.
Catoptrical metal, aluminum or aluminum alloy for example can be as the material of second electrode 15.A plurality of protruding 19 are formed on the upper surface of second electrode 15 or on the surface away from organic EL layer 14 of second electrode 15.Projection 19 is as radiator.With reference to figure 2B, projection 19 is parallel to a side of second electrode 15 and extends.The end of each projection 19 arrives the edge of second electrode 15.In other words, the length of each projection 19 equals the width of second electrode 15.And each projection 19 has rectangular cross section.Shown in Fig. 2 B, the height of each projection 19 is greater than the thickness of second electrode 15.In the figure except Fig. 2 B, show projection 19 and have and the identical height of second electrode, 15 thickness.
The formation of projection 19 is discussed now.Smooth film with predetermined thickness is by carrying out the technology formation as vacuum vapor deposition.Then, projection 19 and flat film (second electrode 15) are undertaken by using shadow mask (shadow mask) that vacuum vapor deposition is whole to be formed, and wherein shadow mask has a large amount of elongated hole that form accordingly with protruding 19 position.As the metal deposition of aluminium and so on corresponding to the upper surface of the flat film of the position of the elongated hole of shadow mask to form projection 19.
The working condition of organic EL device 11 will be discussed now.For example, organic EL device 11 is as backlight liquid crystal display.
When using organic EL device 11, the first splicing ear 13a and the second splicing ear 15a are connected to outside line, anisotropic conductive film (ACF) for example, and this outside line is linked the drive circuit (not shown) that drives organic EL device 11.
Drive circuit offers first electrode 13 by the first splicing ear 13a with electric current.The resistivity of material that forms first electrode 13 (transparency electrode) is greater than having the higher relatively resistivity as the metal of aluminium and copper of conductivity.Therefore, when electric current only when the first splicing ear 13a offers first end of first electrode 13, a large amount of electric currents flow to second electrode 15 by near the organic EL layer 14 the first splicing ear 13a from first electrode 13.Yet, with the first splicing ear 13a divided portion, the magnitude of current that flows to second electrode 15 from first electrode 13 is very little.As a result, in organic EL device 11 brightness irregularities appears.For head it off, in the present embodiment, have first end and the second end 13b that the higher relatively conducting film of conductivity 17 is connected to first electrode 13.The second end 13b is positioned at the farthest from the first splicing ear 13a.Therefore, at the magnitude of current that flows through near the organic EL layer 14 the first splicing ear 13a with to flow through apart from the difference between the magnitude of current of the organic EL layer 14 of the first splicing ear 13a position farthest be little.This minimizes the brightness irregularities in the organic EL device 11.And, the conducting film 17 that covers organic EL layer 14 equably radiation organic EL layer 14 heat and improved brightness irregularities and minimized effect.
Conducting film 17 has the function that electric current is offered the different piece of first electrode 13.Therefore, conducting film 17 must insulate with second electrode 15.Conducting film 17 is positioned at the outside of diaphragm 16, and diaphragm 16 is between the conducting film 17 and second electrode 15.Therefore, the conducting film 17 and second electrode 15 are insulated from each other.
Organic EL device 11 is by current drives.The electric current that flows through organic EL layer 14 produces heat in organic EL layer 14.Too much heat will influence the characteristics of luminescence of organic EL device 11 and shorten life-span of organic EL device 11 in undesired mode.Therefore, for the heat that produces in the radiation organic EL layer 14 effectively, projection 19 is formed on the surface of second electrode 15.
First embodiment has the advantage that describes below.
(1) transparent first electrode 13, organic EL layer 14 and metal second electrode 15 are stacked on the glass substrate 12 successively.And the diaphragm 16 that protection organic EL layer 14 is avoided oxygen and moisture infringement covers second electrode 15.In addition, the projection 19 be formed on away from lip-deep second electrode 15 of organic EL layer 14.Therefore, and inert gas or liquid are filled into the seal cavity that is formed by protective cover come radiation to come the prior art (with reference to figure 5 and 6) of the heat of self-electrode to compare, the heat of organic EL layer 14 is radiated the outside of organic EL device 11 effectively.Because protective cover is optional, so can make thinner organic EL device 11.
(2) diaphragm 16 is a coat film.Form diaphragm 16 if carry out vapour deposition or sputter, this will be difficult to cover the projection 19 that is formed on second electrode, 15 surfaces and without any the gap.Yet, because diaphragm 16 is coat films, so can be when forming diaphragm 16 without any the surface that covers projection 19 with gap.
(3) organic EL device 11 is bottom emissive type devices.Therefore, organic EL device 11 can be linked on the framework, make away from the outer surface towards the organic EL device 11 of glass substrate 12 contact this framework.This will improve thermal radiation effect.
(4) cover of the outside and second electrode 15 insulation of the conducting film 17 of second electrode 15 at diaphragm 16.The first end 17a of conducting film 17 is connected to first end of the first splicing ear 13a of first electrode 13.The second end 17b of conducting film 17 is connected to the second end 13b of first electrode 13 on the opposite side of splicing ear 13a.Therefore, the preferred embodiment aspect of being different from prior art is that auxiliary electrode is formed near first electrode 13 so that the brightness irregularities of organic EL layer 14 minimizes.That is it is unnecessary, being used to make the dielectric film of auxiliary electrode and 15 insulation of second electrode.This has reduced manufacturing cost.And, minimize flowing through near the magnitude of current of the organic EL layer 14 at the part place of the first splicing ear 13a of first electrode 13 and the brightness irregularities that flows through away from the whole organic EL device 11 of official post between the magnitude of current of the organic EL layer 14 at the part place of the first splicing ear 13a.In addition, because conducting film 17 covers organic EL layer 14, the heat homogeneous radiation that produces in the organic EL layer 14.This has improved brightness irregularities and has minimized effect.
(5) conducting film 17 is formed on the diaphragm 16 by carrying out vapour deposition.With metal forming is bonded to diaphragm 16 and compares as conducting film 17, this has improved the bond effect between conducting film 17 and the diaphragm 16.And conducting film 17 is the heat that produced by organic EL layer 14 of radiation and improved brightness irregularities and minimize effect equably.
(6) the first end 17a of conducting film 17 is connected to first end of the first splicing ear 13a of first electrode 13.The second end 17b of conducting film 17 is connected to the second end 13b of first electrode 13 on the opposite side of splicing ear 13a.Therefore, conducting film 17 needn't be connected to first electrode 13 on the adjacent side of a side that is connected with the first splicing ear 13a.This reduced glass substrate 12 not luminous component area and do not influence the efficient lighting area of glass substrate 12.The light that " efficient lighting area " refers to organic EL layer 14 is from the area of the glass substrate 12 wherein sent.
(7) conducting film 17 is metal films.So conducting film 17 has the effect that the oxygen that stops in the surrounding air and moisture enter the function of organic EL device 11 and play passivating film.
(8) conducting film 17 is covered by dielectric film 18, and wherein dielectric film 18 is by making with diaphragm 16 identical materials.Therefore, dielectric film 18 can form by identical method with diaphragm 16.This has the manufacturing that is convenient to organic EL device 11.
(9) dielectric film 18 is formed on the outside of conducting film 17.Conducting film 17 contacted and contingent short circuit with electronic component when this had prevented that organic EL device 11 linked framework.
(10) conducting film 17 is vapor-deposited film made of aluminum.Therefore, conducting film 17 is than easier formation when being made by other metal of for example copper and so on.
(11) second electrodes 15 are made by catoptrical metal.Therefore, some light of organic EL layer 14 send by 15 reflections of second electrode and from glass substrate 12.So, with when second electrode 15 not reflex time compare, increased the light quantity of sending from glass substrate 12.
(12) area of the upper surface of organic EL layer 14 is bigger than the area of second electrode, 15 lower surfaces.Because the area of the area of the upper surface of organic EL layer 14 and second electrode, 15 lower surfaces is inequality, so be easy to prevent short circuit between first electrode 13 and second electrode 15.
(13) use shadow mask so that with on second electrode 15, forming projection 19 with second electrode, 15 identical materials.Forming projection 19 under the situation of not damaging organic EL layer 14 on second electrode 15, projection 19 forms by vapour deposition.For example, form projection 19, might damage organic EL layer 14 if corrode the part of second electrode 15 that forms by vapour deposition with predetermined thickness.
With reference now to the organic EL device 11 of Fig. 3 discussion according to second embodiment of the invention.Omit conducting film 17 and the dielectric film 18 of Fig. 1 C in a second embodiment.And the metal auxiliary electrode 20 that is connected to the first splicing ear 13a is formed on the peripheral part of first electrode 13, and first electrode 13 is formed on the glass substrate 12.Dielectric film 21 is formed on the auxiliary electrode 20.Organic EL layer 14 covers first electrode 13 and dielectric film 21.Second electrode 15 is formed on the organic EL layer 14.Diaphragm 16 is formed on the outside of second electrode 15 and avoids the infringement of oxygen and moisture to protect organic EL layer 14.
After first electrode 13, the first splicing ear 13a and the second splicing ear 15a are formed on the glass substrate 12, form auxiliary electrode 20 by the technology of carrying out for example vapour deposition.Projection 19 is formed on second electrode 15 in the inboard corresponding position with auxiliary electrode 20.
Except that first embodiment (1) arrived the advantage of (3), (11) and (13), second embodiment also had following advantage.
(14) its resistance is formed on the peripheral part of first electrode 13 less than the auxiliary electrode 20 of the resistance of first electrode 13.Compare during with no auxiliary electrode 20, the brightness irregularities that this auxiliary electrode 20 causes the different resistivity by the material that forms first electrode 13 and second electrode 15 minimizes.
Do not breaking away under the spirit and scope of the present invention, the present invention can comprise many other concrete forms, and this is clearly for those skilled in the art.Particularly, be to be understood that the present invention can also comprise following form.
Organic EL device 11 needn't have conducting film 17 and dielectric film 18 or auxiliary electrode 20.For example, as shown in Figure 4, in not having the common organic EL device 11 of these parts, diaphragm 16 can be formed on the projection 19 of second electrode 15.Like this, the heat that is produced by organic EL layer 14 gives off organic EL device 11 effectively by second electrode 15 and projection 19.
The shape of cross section of each projection 19 needs not to be rectangle.And the length of each projection 19 needn't be equal substantially with the width of second electrode 15.For example, each projection 19 can have and the basic equal lengths of the width of electrode 15, but has triangle or semi-circular cross-section.Selectively, the end of each projection 19 needn't reach the edge of second electrode 15.And, each projection 19 needn't with the parallel or vertical extent of a side of second electrode 15.For example, each projection 19 can be extended at an angle with a side of second electrode 15.And, adjacent projection 19 needn't be parallel to each other and its can extend with different directions.
Each projection 19 can be box-like, cylindrical, pyramid, taper shape, truncated pyramidal, conical butt or hemisphere.Like this, if the gross area of the lower surface of projection 19 is identical with the gross area of the projection 19 of Fig. 2 B, the total surface area of projection has just increased.This has improved thermal radiation effect.
Be substituted in the projection 19 that forms on second electrode 15, can in second electrode 15, form groove.Alternatively, second electrode 15 can have the projection and groove the two.Usually, the formation of projection 19 is easier than the formation of groove.In order to form groove from the teeth outwards, when forming second electrode 15, use shadow mask to carry out vapour deposition.This forms second electrode 15 and the groove under the situation of not damaging organic EL layer 14.If form groove by corrosion part second electrode 15, this may damage organic EL layer 14.
Replace the liquid material coating that is used to form diaphragm 16, can carry out vapour deposition and form diaphragm 16.Vapour deposition for moisture or for example the gas of oxygen have a very little transmitance material to form diaphragm 16.This material can be the carbon (DLC) of silicon nitride, silica or diamond class.Alternatively, diaphragm 16 can form by the stacked film of being made by a plurality of different materials.When carrying out vapour deposition formation diaphragm 16, preferably regulate the position of glass substrate 12 so that deposit the material of vapour deposition on first electrode 13, organic EL layer 14 and second electrode 15 from all directions.
Organic EL device 11 is not must be as backlight, also can be used as other type luminescent device, display device light source or as an EL display device.For example, when using organic EL device 11 in the display device that drives according to the active matrix technology, organic EL device 11 can comprise a plurality of first electrodes 13 and single second electrode 15.Each first electrode 13 is used as independently anode, and single second electrode 15 is as the negative electrode of all first electrodes 13.First electrode 13 can be arranged in the matrix array.Electric current is provided for each first electrode 13 by thin-film transistor (TFT), thin film diode (TFD) or metal-insulator metal (MIM).A plurality of protruding 19 are formed on second electrode 15.This has improved the radiation efficiency of display device.
The second splicing ear 15a of second electrode 15 is not a side that must be arranged on the glass substrate 12 identical with the first splicing ear 13a of first electrode 13.For example, the second splicing ear 15a can be arranged on a side of the glass substrate 12 of being close to the first splicing ear 13a.
The first end 17a of conducting film 17 can be directly connected to the first splicing ear 13a of first electrode 13.
When organic El element 11 was used for display device, substrate can form by stacked colour filter on transparent substrates.
The transparent resin substrate can be used for instead of glass substrate 12.Resin substrates can be flexible.In the time will reducing the weight of organic EL device 11, resin substrates has superiority.
Conducting film 17 can be connected to foursquare first electrode 13 in first side, and it is connected to splicing ear 13a, be positioned at second side of opposite side of splicing ear 13a and the side contiguous with the first splicing ear 13a.This has further reduced brightness irregularities.
Metal except aluminium also can be used as formation second electrode 15.For example, gold, silver, copper, chromium or indium can be used to form second electrode 15.Can anti-oxidant and raising durability by the metal film that gold or chromium form.
The material of transparency electrode is not limited to ITO.For example, zinc oxide can be used to replace ITO.
Replacement forms first electrode, 13, the first electrodes 13 by conduction and material transparent and can be formed by transparent and metal level as thin as a wafer.Layer as thin as a wafer preferably arrives in the scope of 20nm 0.5 for having the layer of 50nm or littler thickness.
This example and execution mode are considered to illustrative and not restrictive, and the present invention is confined to particular content given herein, but can change in the scope of appended claims and equivalent.
Claims (7)
1. an organic electroluminescence device (11) comprising:
The substrate (12) that is used for visible light transmissive;
Be stacked in first electrode (13) that is used for visible light transmissive on the substrate;
Be stacked in the organic electro luminescent layer (14) on first electrode;
Be stacked in second electrode (15) on the organic electro luminescent layer, this second electrode comprise first surface towards organic electro luminescent layer, away from a plurality of projectioies that are provided with towards the second surface of organic electro luminescent layer with along second surface or a plurality of grooves at least the two one of; And
Cover the diaphragm (16) that second electrode is used to protect organic electro luminescent layer.
2. according to the organic electroluminescence device of claim 1, wherein diaphragm is a coat film.
3. according to the organic electroluminescence device of claim 1, wherein diaphragm is adjacent with second electrode.
4. according to the organic electroluminescence device of claim 1, wherein diaphragm closely contacts with second electrode.
5. according to the organic electroluminescence device of claim 1, wherein a plurality of projectioies and a plurality of grooves at least the two one of form with second electrode is whole.
6. according to any the organic electroluminescence device among the claim 1-5, wherein first electrode has first end that comprises splicing ear (13a) and is positioned at second end (13b) of the first end opposite side, and this organic electroluminescence device further comprises:
The conducting film of the covered with protective film and second electrode (17), this conducting film and second electrode insulation also are connected to first and second ends of first electrode.
7. according to any the organic electroluminescence device among the claim 1-5, further comprise:
Be positioned at the auxiliary electrode (20) in first electrode outside, this auxiliary electrode is connected to first electrode and has resistance less than the resistance of first electrode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP281887/2003 | 2003-07-29 | ||
| JP2003281887A JP2005050697A (en) | 2003-07-29 | 2003-07-29 | Organic electroluminescent element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1578554A true CN1578554A (en) | 2005-02-09 |
Family
ID=33549979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100684411A Pending CN1578554A (en) | 2003-07-29 | 2004-07-29 | Organic electroluminescence device |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20050023965A1 (en) |
| EP (1) | EP1505665A2 (en) |
| JP (1) | JP2005050697A (en) |
| KR (1) | KR100679908B1 (en) |
| CN (1) | CN1578554A (en) |
| TW (1) | TWI259017B (en) |
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| CN109166979A (en) * | 2018-08-09 | 2019-01-08 | 深圳市华星光电半导体显示技术有限公司 | A kind of el display device and preparation method thereof |
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- 2003-07-29 JP JP2003281887A patent/JP2005050697A/en not_active Withdrawn
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2004
- 2004-07-23 KR KR1020040057486A patent/KR100679908B1/en not_active IP Right Cessation
- 2004-07-27 TW TW093122345A patent/TWI259017B/en not_active IP Right Cessation
- 2004-07-27 US US10/899,840 patent/US20050023965A1/en not_active Abandoned
- 2004-07-28 EP EP04017850A patent/EP1505665A2/en not_active Withdrawn
- 2004-07-29 CN CNA2004100684411A patent/CN1578554A/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20050013931A (en) | 2005-02-05 |
| JP2005050697A (en) | 2005-02-24 |
| KR100679908B1 (en) | 2007-02-07 |
| TWI259017B (en) | 2006-07-21 |
| TW200505269A (en) | 2005-02-01 |
| US20050023965A1 (en) | 2005-02-03 |
| EP1505665A2 (en) | 2005-02-09 |
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